Exercise ball rack



FIG. 1 is a perspective view of an exercise ball rack showing my new design;

FIG. 2 is a right side view thereof:

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof

FIG. 5 is a rear view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top plan view thereof. 

CLAIM The ornamental design for an exercise ball rack, as shown and described. 